Show a label to describe some invalid drag-drop operations in Files app.

ui/file_manager/file_manager/background/js/volume_info_impl.js

Index: ui/file_manager/file_manager/background/js/volume_info_impl.js
diff --git a/ui/file_manager/file_manager/background/js/volume_info_impl.js b/ui/file_manager/file_manager/background/js/volume_info_impl.js
index 71ec24374a0a0e6fd28dd3f8982d998eb33487cb..c2904b73c5d8df5fb3d78a5d0f895c860661ea11 100644
--- a/ui/file_manager/file_manager/background/js/volume_info_impl.js
+++ b/ui/file_manager/file_manager/background/js/volume_info_impl.js
@@ -20,6 +20,8 @@
  * @param {(string|undefined)} devicePath Identifier of the device that the
  *     volume belongs to. Can be undefined.
  * @param {boolean} isReadOnly True if the volume is read only.
+ * @param {boolean} isReadOnlyRemovableDevice True if the volume is read only
+ *     removable device.
  * @param {!{displayName:string, isCurrentProfile:boolean}} profile Profile
  *     information.
  * @param {string} label Label of the volume.
@@ -38,6 +40,7 @@ function VolumeInfoImpl(
     deviceType,
     devicePath,
     isReadOnly,
+    isReadOnlyRemovableDevice,
     profile,
     label,
     extensionId,
@@ -83,6 +86,7 @@ function VolumeInfoImpl(
   this.deviceType_ = deviceType;
   this.devicePath_ = devicePath;
   this.isReadOnly_ = isReadOnly;
+  this.isReadOnlyRemovableDevice_ = isReadOnlyRemovableDevice;
   this.profile_ = Object.freeze(profile);
   this.extensionId_ = extensionId;
   this.hasMedia_ = hasMedia;
@@ -148,6 +152,12 @@ VolumeInfoImpl.prototype = /** @struct */ {
     return this.isReadOnly_;
   },
   /**
+   * @return {boolean} Whether the device is read-only removable device or not.
+   */
+  get isReadOnlyRemovableDevice() {
+    return this.isReadOnlyRemovableDevice_;
+  },
+  /**
    * @return {!{displayName:string, isCurrentProfile:boolean}} Profile data.
    */
   get profile() {